AgCl and AgBr have been investigated by photoemission for photon energies $h\ensuremath{\nu}=16.8, 21.2, ,26.9, 40.8, \mathrm{and} 1486.6$ eV. By exploiting the strong dependence on $h\ensuremath{\nu}$ of the photoionization cross sections for the atomic orbitals composing the valence bands, we have been able to deduce approximate partial $p$ and $d$ densities of valence states for these compounds. The most conspicuous feature of the photoelectron distribution curves is a sharp peak near the center of the valence band, which our partial density of states shows to be mostly $d$-like. The $p$ density of states exibits two main peaks centered at 2- and 5-eV binding energy and a gap at the energy of the sharp $d$ peak. From the $p$ and $d$ densities of states we conclude that, except for the sharp $d$-like peak and the associated $p$ gap, the $p$ and $d$ functions are nearly equally and uniformly mixed throughout the valence band. The results are compared with partial densities of states calculated with a simplified tight-binding scheme and the band structure is discussed in detail.

Photoemission from AgCl, AgBr, and AgI has been studied at photon energies hω = 16.8, 21.2, 26.9, 40.8, 48.4 and 1486.6 eV. By exploiting the strong

Measurements of the energy-distribution curves of photoemitted electrons were made for amorphous and crystalline samples of AgIn${\mathrm{Te}}_{2}$ and CuIn${\mathrm{S}}_{2}$. The energies of the exciting photons were 21.2 eV (He I), 40.8 and 48.4 eV (He II), 16.8 eV (Ne I), 26.9 eV (Ne II), and 1486.6 eV (A1 $\mathrm{K}\ensuremath{\alpha}$). The crystalline and amorphous samples were in the form of thin sputtered films, although, to demonstrate consistency, some measurements were also performed on bulk samples with A1 $\mathrm{K}\ensuremath{\alpha}$ radiation. It is shown that the obtained photoelectron-distribution curves represent the heavy $d$ admixture present in the valence bands. They can be decomposed into approximate partial $p$ and $d$ densities of valence states by using atomic cross sections for the corresponding partial excitation probabilities. These results are compared with information available on $p\ensuremath{-}d$ mixing based on the spin-orbit splitting of the band-edge excitons. The binding energies of the outermost core levels of the constituent atoms and their core shifts are presented. The energy of the valence plasmons is found to be 13.3 eV for AgIn${\mathrm{Te}}_{2}$ and 16.6 eV for CuIn${\mathrm{S}}_{2}$. These plasma frequencies contain a negligible contribution of the $d$ electrons.

High resolution photoemission spectra of co-sputtered CuxAg1−x (0⩽x⩽1) alloys have been measured for hν=40.8 and 21.2 eV. The electron

The photoelectron energy distribution curves for CuCl, CuBr, CuI, and AgI have been measured for $\ensuremath{\hbar}\ensuremath{\omega}=16.8, 21.2, 26.9, 40.8, 48.4, \mathrm{and} 1486.6$ eV. By exploiting the strong dependence on $\ensuremath{\hbar}\ensuremath{\omega}$ of the photoionization cross sections of the atomic levels comprising the valence band, we have been able to determine the $s$, $p$, and $d$ partial densities of valence states. These results compare well with those obtained by x-ray fluorescence and x-ray photoemission, but have better resolution. It is found that the $d$ levels of ${\ensuremath{\Gamma}}_{12}$ symmetry remain corelike, while the ${\ensuremath{\Gamma}}_{15}$ $d$ levels band significantly. In the Cu compounds the ${\ensuremath{\Gamma}}_{15}$ levels of predominantly $d$ character lie above the ${\ensuremath{\Gamma}}_{12}$ bands, which in turn lie above the mainly $p$-like ${\ensuremath{\Gamma}}_{15}$ levels. This level ordering is reversed in AgI. The band structure and densities of valence states computed from a seven-function basis set, consisting of four bonding $s\ensuremath{-}p$ orbitals and three ${d}_{\mathrm{xy}}$ orbitals, are shown to reproduce the trends observed in the density of valence states of these compounds.

A new isomer withT1/2=58±2 ms has been observed in205Po. We propose the assignmentsIp = 19/2- and an excitation energyEx=1461 keV.

A new isomer withT1/2=58±2 ms has been observed in205Po. We propose the assignmentsIπ = 19/2− and an excitation energyE x =1461 keV.

The magnetic moment of the 132+ state in 207Po was determined to be μ = −0.910 ± 0.014 n.m. An analysis of this value and other known moments of i132 neutron states around 208Pb supports the existence of a mesonic contribution of at least −0.3 n.m. to the moment.

The magnetic moment of the 13 2 + state in 207 Po was determined to be μ = −0.910 ± 0.014 n.m. An analysis of this value and other known moments of i 13 2 neutron states around 208 Pb supports the existence of a mesonic contribution of at least −0.3 n.m. to the moment.

The magnetic moment of the 132+ state in 207Po was determined to be μ = −0.910 ± 0.014 n.m. An analysis of this value and other known moments of i132 neutron states around 208Pb supports the existence of a mesonic contribution of at least −0.3 n.m. to the moment.

The g-values of [(πh92)2, 8+] isomeric levels in 204Po and 206Po have been measured with the stroboscopic method. The results obtained are: g(204Po) = 0.923±0.013 and g(206Po) = 0.919±0.013. These and other known g-factors of (πh92)n states in the 208Pb region are compared with theoretical predictions in order to analyze the dependence of the h92 proton g-value on the core constitution. The variation of the g-values is systematically smaller than expected from first-order configuration mixing theory, if pure shell-model wave functions are assumed.